View at Official suse advisory, NVD, CVE.org · CVE detail
Freshness: upstream tracker timestamp is available; use API updated time as primary recency signal.
CVE-2023-3138 severity important: SUSE including 290 source package names (11-6.9:libX11-6-1.6.5-150000.3.30.1, 11-6.9:libX11-data-1.6.5-150000.3.30.1, …), 814 product×package rows across 174 product lines (Container bci/openjdk, Container bci/openjdk-devel, … (174 product lines)): Fixed 583, Known Affected 231.
A vulnerability was found in libX11. The security flaw occurs because the functions in src/InitExt.c in libX11 do not check that the values provided for the Request, Event, or Error IDs are within the bounds of the arrays that those functions write to, using those IDs as array indexes. They trust that they were called with values provided by an Xserver adhering to the bounds specified in the X11 protocol, as all X servers provided by X.Org do. As the protocol only specifies a single byte for these values, an out-of-bounds value provided by a malicious server (or a malicious proxy-in-the-middle) can only overwrite other portions of the Display structure and not write outside the bounds of the Display structure itself, possibly causing the client to crash with this memory corruption.